Refacing tool



June ,5, 1923.

E. o. COATS ET AL REFACING TOOL Filed Dec. 19. 1921 1 s Sheets-Sheet 1 gwuemkoz Edward E!- E-mats 1131111 .15 arhhulumew ginmul Edward [1111:1511 5 m M w V m Wm H Rug .lE: arnh 1:11 umew.

Jime 5, 1923.. 1,457,725

E. O. COATS ET AL REFAC ING TOOL Filed Dec. 19. 1921. 5 Sheets-Sheet 3 jwucn-foz Edwards [M11351 5 and R Jihafithulmmsw Patented June 5, 1923.

UNITED. ST TES meme PATENT orricn" EDWARD o. COATS AND nor No. BARTHOLOMEW, or LEETON, rssounr; sar

oon'rs essrelvoa T JOHN L. STACY AND EDWIN F. HAUSAM', BOTH or SEDALIA,

MISSOURI. i

REFACING TOOL.

Application filed December 19, 1921. Serial No. 523,541.

To all whom it may concern Be it known that we, EDWARD COATS and Roy J. BART oLoMnw, citizens of the United States, residing at Leeton, in the county of Johnson and State of Missouri,

have invented certain new and useful Improvements in Refacing Tools, of which the following is a specification. V

This invention relates to tools of the type particularly adapted for use in connection with internal combustion engines, and the primary object of the invention is. the provision of a novel tool for refacing the thrust collars of crank shafts of'internal combustion engines, which is so constructed that the necessity of removing the crank shaft for the refacing operation is eliminated.

A. further object of the invention is the provision of an improved refacing tool,

which is adapted to be connected directly with the crankcase of an engine, and which embodies a cutting tool and means for adjusting the tool in relation to the collar to be trued, the collar being trued by rotating the crank shaft, whereby the necessity of providing complicated operating means for actuating a refacing cutter is eliminated.

- A further object of the invention is the provision .of a novel refacing tool,which can be readily held in one position for refacing the thrust collar and readily held in a reversed position for refacing the thrust shoulder formed on the crank shaft.

A further object of the invention is the provision of an improved refacing tool, em-

bodying a base plate or. casting for connection with one of the main bearings of a crank shaft, a cutting tool, and means for holding and guiding the cutting tool on the base plate or casting, and means for adpisting the cutting tool, the cutting-tool being held stationary in relation to the surface to be refaced, which can be, rotated in any preferred .lnann rs ll further object of the inventi n is the provision of an improved refacing tool for the thrust collars of crank shafts of internal combustion engines of the above char.- a ter, hich will be durable and effi ient in use, one that will e si ple and eas vto manufacture, and one which can be placed upon the in.arlnat at a reasonable cast assoc a ed with an engin Withthesehnd other objectsm vi w, the

-. n ine tion with engines f th invention consists inthe novel construction, arrangement and formation of parts, as will be hereinafter more specifically described,

claimed and illustrated in the accompanying drawings, forming a part of this specification, 1n which drawings: Figure 1 18 a perspect ve view of a crank case of a motor, showing the, improved rcefacing tool connected therewith and in: position for refacing the thrust collar of the crank shaft.

Figure 2 is a top plan view of tlle irn proved refacing tool, showing the same in operative position for refacing the thrust collar, a, fragment of the crank shaft being shown.

Figure 3.is a side elevation of the improved tool in an operative position for refacingthe thrust collar, a fragment of the crank case and shaft also being shown. Figure 4 is a similar view with parts thereof in section and the position 'tllfil Qf reversed for permitting the refacing of the thrust shoulder formed on the crank shaft. Figure 5 is a central longitudinal section through the rear crank shaft bearing and case and the improved refacingtool, taken on the line 5+5 of Figure 2, showing the same in operative position for.v refacing the thrust collar which is shown partly in section, a fragment of the crank shaft being shown in elevation. Y e

Figure 6 is a detail perspective View of the attaching base plate or casting .of the improved tool, the cutting tool andholding and guiding screws being shown in dotted lines.

Referring to the drawings in detail, wherein similar reference characters designate'corresponding parts throughout the severalviews, the letter indicatflsan ternalcombustion engine; and ,B, the mproved-tool for refacing a thrust collar :of

the said engine. I

he'internal eombus ionengine A may be of the usual or any p eferred type, bnt the tool i particularly a apt b efn use in and su h an eng'ine has been the dra ings Only engine have been shown to Us? ofthe improv d tool, and as s, .cwn :t e engine A includes the *nsnai crank Q 0 having the 1- aes eaie th nwith in the usual manner. The rear portion of the crank case 10 is provided with the ordinary main supporting bearing 12 for the reception of the crank shaft 11, and this bearing 12 is provided with the usual bolt openings 13 for the reception of the retaining screws for the bearing cap (not shown). The extreme rear end of the crank shaft 11 is provided with a thrust collar 14 and this collar may also have formed thereon the fly wheel attaching flange 15 which forms no part of the present invention. Inwardly of the thrust collar 14, the crank shaft 11 is provided with a thrust shoulder 16 and the thrust collar lt and the thrust shoulder 16 are adapted to engage the opposite ends or faces of the bearings 12.

The improved tool B is adapted to be associated and to cooperatewith the bearing 12 and the crank shaft 11, and includes the attaching base plate or casting C; the guide D formed thereon; E, the tool slidably mounted in the guide; and F, the means for adjusting the tool.

The base plate or casting C is of novel construction and is adapted to be connected directly with the portion. 12 of the rear hearing for the crank shaft, and when this casting Or base plate is in position, a complete bearing for the crank shaft is formed. As shown the base plate or casting C includes a substantially semi-cylindrical body 20, the opposite longitudinal edge of which is provided with threaded attaching cars 21, which are adapted to overlie and extend in direct alignment with the usual bolt holes 13 formed in the lower half of the rear bearing 12. Suitable bolts 22 are extended through the aligned attaching ears 21 and the bolt holes 13 for connecting the base plate or casting C with the said bearing and lock nuts 23 can be utilized for holding the bolts in position. The upper surface of the body is provided with a flat bearing face or guide 25, which may be in the nature of a reinforcing rib if so desired. This rib forms a part of the guide D for the tool E, and the forward end of the body is provided with an outstanding flange 26, for engagement with the thrust collar 14:. This flange 26 is slotted, as at 27, and the slotted portion is in direct alignment with the base and cooperates therewith to form the guide D. The base 25 directly inwardly of the slot 27 is also slotted as at 28, cooperating with the slot 27 to form a guide for the head of the tool E which will be hereinafter more fully described. Transversely extending reinforcing ribs 29 can be formed on the body 20 if desired,- and these ribs extend downwardly from the opposite sides of the bearing face or rib 25 and this hearing face or rib 25 at the intersection of the reinforcing transverse ribs 29 therewith,

is provided with threaded openings 30 for the reception of the retaining and guide machine screws 31, the heads of which are adapted to overlie the tool E, which will now be described.

The tool E is preferably formed from high speed tool steel and is provided with the shank 32 and the cutting head 33. This head 33 extends below the lower edge of the shank 32 and has its lower edge curved as at 3st. The free edge of the head is provided with a cutting edge 35 for engaging the surface to be refaced. The shank 32 of the tool E is adapted to slide between the screws 31 and thus is held against lateral movement. The depending portion of the head 33 extends into the slot 28 formed in the body portion 20 of the casting or base plate C.

The adjusting means F for feeding the cutting tool E toward the surface to be refaced consists of a cap screw 36 which is threaded into an upstanding flange or ear 37 formed on the body 20 at the rear end of the guide face or rib 25. It can be seen that by rotating the screw, the same will be forced into engagement with the free end of the shank 32 of the tool E and force the sharpened end 35 thereof into engagement with the work. The body 20 directly below the adjusting screw 36 is cut out as at 38, in order to permit the free turning of the screw by a suitable tool. One longitudinal edge of the body 20 is cut at an incline as at 39 so as to permit the free exit of shavings of the face of the thrust collar or other surface being refaced.

When it is desired to reface the thrust collar, the cylinder block (not shown) is first removed and the casting or base plate C is placed in position on the lower half of the rear bearing 12 and held in position by means of the bolts 22 and nuts 23. The cutting tool E is then adjusted into engagement with the surface of the thrust collar which is to be refaced by adjusting the screw 36, after which the crank shaft is turned in any preferred manner. This will effectively reface the thrust collar and the arrangement of the tool entirely eliminates the necessity of providing complicated actuating mechanism for the cutting tool and eliminates the necessity of removing the crank shaft from the crank case. The posi tion of the tool for refacing the thrust collar is clearly shown in Figure 3 of the drawings.

When it is desired to reface the thrust shoulder 16 of the crank shaft, it is merely necessary to reverse the position of the refacing tool, as clearly shown in Figure 4 of the drawings, and the tool is held in place in the same manner, and the cutting tool E adjusted by the same method as just de scribed.

From the foregoing description, it can be seen that an improved and simple refacing tool has been provided which can beeffectively used for both refacing the thrust collar and thrust shoulders of crank shafts, and which is so constructed as to permit the same to be readily and quickly placed into or removed from position.

Changes in details may be made without departing from the spirit or scope of this invention; but,

We claim: 7

LA refacing tool for the thrust collars of crank shafts comp-rising a body arranged to engage and constitute a part bearing for the crank shaft, anda cutting tool carried by the body adjustable longitudinally of the crank shaft for engaging the thrust collar.

2. In a refacing tool,aba se plate, means for rigidly securing the base platein position, a cutting tool slidably carried by the base plate, and means for adjusting said tool in relation to the base plate and work.

3. In a. refacing tool, a base plate, means for attaching the base plate rigidly in position, a guide carried by the base plate, a removable cutting tool slidably mountedin said guide, and means carried by the base platefor permitting the adjustment of said cutting too-l in relation to the work and to the base plate.

4. A refacing tool for the thrust collars of crank shafts comprising a body arranged to engage and constitute a part bearing for the crank shaft, means for rigidly securing the body against movement in relation to the crank shaft, and a cutting tool carried by the body adjustable longitudinally of the crank shaft for engaging the thrust collar.

5. A refacing tool for the thrust collars and shoulders of crank shafts comprising a base plate arranged to'engage and constitute a part bearing for the crank shaft, and a cutting tool carried by said base plate presenting a cutting edge radially of the axis of the shaft and beyond the end of the base plate to engage the collar or shoulder of the shaft. c i 6. A re-facing tool for thrust collars and shoulders of crank shafts comprising a base plate arranged to conform'to the configuration of a crank shaft and constitute a part bearing for the same, means for rigidly and removably securing the base plate in position against rotary movement, a guide formed on said base plate, a cutting tool mountlongitudinally of justing the tool'in saldguide toward and I 1 away from the surface to be refaced'.

7. As a new article of manufacture, a refacing tool for thrust collars and shoulders of crank shafts comprising a base plate shaped to-partially embrace a crank shaft, means for securing the base plate in position, a cutting tool carried bythebase plate and arranged to project outwardly from one end thereof, means for adjusting said cutting tool, and means for holding the tool against accidental displacement from the base plate, the end of said base plate from which the tool is adapted to project being inclined inwardly from said tool to permit the free passage of material cut from the surface being refaced by said tool.

8 As a new article of manufacture, a refacing tool for thrust collars and shoulders of crankshafts' comprising a base plate arranged to partially encircle a crank shaft,

means for securing the body to the bearing of the crank shaft, a guide face formed at the longitudinal center of the base plate, a

cutting tool including a shank and head,

retaining means carried by the base plate for engaging the shank, an upstanding ear formed on the base plate, and an adjusting screw carried by the ear for engaging the. shank of the cutting tool for adjusting the.

position of the cutting tool'on said base plate.

9. In a device for refacing the thrust collars and shoulders of a crank shaft, the combination with a crank shaft thrust collar and a thrust shoulder, and a pillow block. for the crank shaft receiving openings therein, of

shaft, attaching ears formed on the base plate having openings therein arranged to including a having bolt a base plate arranged to partially encircle the crank align with the bolt openings formed in the pillow block, bolts fitted in the openingsin the ears and the bolt openings, a guide formed on the base plate, a cutting tool slidably mounted in the guide,-and means car-1 ried by the base plate for adjusting the tool toward the thrust collar or shoulder.

EDWARD o; COATS,

ROY J NO. BABTHOL OMEW. 

